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10.577,255'., Patented Peb. 16, 1897..

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BERNARD IIERSTEIN, OF ELIZABETH, NEW JERSEY.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 577,255, dated February16, 1897.

Application iled J'nne 19, 1896. Serial No. 596,130. (No model.)

To all whom t may concern:

Be it known that I, BERNARD I-IERSTEIN, residing in Elizabeth, in theState of New .I ersey, have invented a newrand useful Improvement inWrenches, of which the following is a full and exact specification.

My invention relates to that class of wrenches which are used forsetting up nuts,

bolts, dac., and particularly to Vthose which the upper portion is cutaway to show a longitudinal section of the, adjusting device. Fig. 4 isa side view of my device. Fig. 5 is a cross-section taken in the line 12 of Fig. 3. Fig. 6 is a side view of the inner side of the sliding headD, while Fig. 7 is an outside view of the same.

In the drawings, A A are the jaws or plates which fit over the nut to beturned.

H is the solid handle, provided at one end with the arms I-I, to whichthe rotatable jaws A A are afIiXed by the studs O C, which are fastenedby the screws B.

The washer B is interposed between the jaws and the arm to facilitatethe rotation of the jaws, and the washer B' at the outer end is placedin a countersunk recess for the same In Fig. 3 H" is the solid handlehaving the arms H'", forming an integral part thereof. The jaws A A areaffixed to the sliding heads D D. The washer B has the same function asin Fig. l. The sliding heads D D, bearing the jaws A A, are held inposition by the bar E, which is fastened to the arms I H". The lower endof the head is V-shaped and moves in a groove in the lower part of theopening between the arms, as shown in Fig. 5. The right and left screw Fworks in the lower part of the slidingheads D D and serves to move theheads with the jaws attached to and from each other.

The operation of my device is simple. The

jaws A A are placed over the head of the nut or bolt-head to be'turnedand are adjusted to the desired width of opening. The handle is broughtaround for one-half the circumference of the circle which it willdescribe, and then, if the adjacent objects prevent a completerevolution of the handle, it is carried vertically up and over to itsformer position without removing the jaws from the nut, the jaws A Aturning so that this may be done without affecting the grip on the nut.This will of course bring the other side of the handle uppermost, but asthe sides are alike that makes no difference, and upon the completion ofthe next half-circle the handle will again be brought back to its rstposition.

It will also be seen thatthe jaws A A are not perfectly square, but, asshown in the drawings, have their greatest dimension parallel with thelength of the wrench. This may be sometimes changed to advantage,and thejaws may be turned sol that they will be at right angles with thedirection of the handle, when they will project beyond the line of thebody of the handle, and may be used upon nuts or bolts situated so thatthey could not be easily operated upon by the jaws in their formerposition. This second position corresponds to that of the jaws in theordinary monkeywrench, with the additional advantage remaining that thehandle can be adjusted to return to its first position by means of thevertical half-circle motion.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is

1. A wrench having its operating-j aws rotatable and their planesparallel with the line of the length of its handle, substantially asdescribed.

2. A wrench having its operating-jaws located upon arms at the extremeend of its handle and adapted to be rotated thereupon, substantially asdescribed.

3. An adjustable wrench' having its operating-jaws rotatable and theirplanes parallel with the line of the length of its handle, sub=stantially as described.

4. An adj ustable'wrench having its operai: ing-jaws rotatable andarranged upon sliding or carrying heads, so as to permit a verticalsemicircular motion of the handle, while the IOO jaws are closed upon anut or other body to be operated on, substantially as described.

5. An adjustable wrench having rotatable jaws pivoted to sliding headsand provided 5 with an adjusting device, substantially as described.

G. An adjustable wrench having rotatable jaws carried upon adjustableheads so arranged at the end of its handle that the planes Io of thejaws are in the direction of the length of the handle, substantially asdescribed.

7. An adjustable wrench having rotatable jaws arranged upon slidingheads adapted to move upon a bar set between the arms at the

